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Question 11. Which of the following predicate calculus formulas is not a tautology? 1. Vz?P(z) A)-> 2:P(x) A, where x does not occur as a

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Question 11. Which of the following predicate calculus formulas is not a tautology? 1. Vz?P(z) A)-> 2:P(x) A, where x does not occur as a free variable in A. 113x(P(z) ? A) ? VmP(z) ? A, where does not occur as a free variable in A. 111. Vz(P(z) ? Q(z))-> (VzP(x) ? VaiQ(z)). A Formula I C) Formula III B) Formula II D) Formula IV

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